- $ I\\\left( { - \\\frac{b}{{2a}};\\\; - \\\;\\\frac{\\\Delta }{{4a}}} \\\right)$.
- $ I\\\left( { - \\\frac{b}{a};\\\; - \\\;\\\frac{\\\Delta }{{4a}}} \\\right)$.
- $ I\\\left( {\\\frac{b}{{2a}};\\\;\\\;\\\frac{\\\Delta }{{4a}}} \\\right)$.
- $ I\\\left( { - \\\frac{b}{{2a}};\\\;\\\;\\\frac{\\\Delta }{{4a}}} \\\right)$.